The tutorial covers the main theoretical aspects of commodity science in the field of domestic and foreign trade. The main concepts, principles, objects and methods of modern commodity science are studied, the problems of developing unified terminology in international trade after Russia's accession to the WTO are taken into account; classification and coding issues in international trade; basics of forming and managing the assortment of goods using both classical tools and category management principles; features of consumer properties of goods; quality factors at the stages of the product life cycle, including product requirements, as sources of technical barriers; factors that preserve quality, including issues of product labeling and packaging, problems of creating an environmental awareness of consumers when disposing of goods and packaging; identification of goods using digital tools for traceability at life cycle stages.